3
VISUAL INSPECTION
Visually inspect the unit before the initial start. Check for loose or missing parts and damages that may
have occurred in shipment. If freight damages have occurred, contact the freight company.
PRINCIPLE OF OPERATION
On models AB and AR the generator stator in addition to the main phase out put winding has an
auxiliary phase winding that is connected to a capacitor(s). The resultant current flow creates an
alternating armature reaction that can be considered the combination of two rotating fields. One field is
in the direction of the generator rotation at the same speed. The other is in the opposite direction and
inducing in the rotor field winding an electromagnetic field double the rated frequency. By connecting a
diode in series with the rotor field winding the current is rectified and the necessary excitation obtained.
The voltage regulation at load is ensured by the field build-up generated by the armature reactance and
rotating field windings.
SAFETY PRECAUTIONS
Before operating the generator set, read the owner’s manual and become familiar with it and your
equipment. Safe and efficient operation can be achieved only if the equipment is properly operated and
maintained. Many accidents are caused by failure to follow fundamental rules and precautions.
The following symbols found throughout this manual alert you to potentially dangerous conditions to
the operator, service personal or the equipment.
DANGER
This symbol warns of immediate hazards, which if not avoided, will result in severe personal
injury or death.
WARNING
This symbol refers to a hazard or unsafe practice, which if not avoided, could result in
severe personal injury or death.
CAUTION
This symbol refers to a hazard or unsafe practice, which if not avoided, might result in
minor or moderate injury or product or property damage.
